package com.edu.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.edu.entity.Teacher;
import com.edu.mapper.TeacherMapper;
import com.edu.service.TeacherService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 讲师 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2021-06-09
 */
@Service
public class TeacherServiceImpl extends ServiceImpl<TeacherMapper, Teacher> implements TeacherService {

	@Override
	public Map<String, Object> getTeacherFrontList(Page<Teacher> pageParam) {
		QueryWrapper<Teacher> wrapper = new QueryWrapper<>();
		wrapper.orderByDesc("id");

		baseMapper.selectPage(pageParam,wrapper);

		List<Teacher> records = pageParam.getRecords();
		long current = pageParam.getCurrent();
		long pages = pageParam.getPages();
		long size = pageParam.getSize();
		long total = pageParam.getTotal();

		boolean hasNext = pageParam.hasNext();
		boolean hasPrevious = pageParam.hasPrevious();


		Map<String,Object> map = new HashMap<>();
		map.put("items", records);
		map.put("current", current);
		map.put("pages", pages);
		map.put("size", size);
		map.put("total", total);
		map.put("hasNext", hasNext);
		map.put("hasPrevious", hasPrevious);

		return map;
	}
}
